NCEL 



Technical Note 



JtcJnA/o-fe^ 

 N-1858 



May 1993 

 By H. Thomson 



Sponsored By Naval Facilities 

 Engineering Command 



DIVER-OPERATED 



BURIED PIPE AND CHAIN 



LOCATOR 



ABSTRACT A prototype system has been developed for use by 



the Navy Underwater Construction Teams (UCTs) in locating submerged 

 ferrous objects (such as pipelines and mooring chain). The system con- 

 sists of a commercially available magnetometer modified to meet the UCT 

 mission requirements. The magnetometer, a fluxgate sensor built for 

 terrestrial use, is manufactured by Forster Instruments, Incorporated. The 

 sensor was modified to be used underwater by divers, or dipped (slow 

 towed) from a small inflatable boat. This report documents the develop- 

 ment of this prototype tool, called the Diver-Operated Buried Pipe and 

 Chain Locator. 



LIBRARY 



Woods Hole Occanographic 

 Institution 





CIVIL ENGINEERING LABORATORY PORT HUENEME CALIFORNIA 93043-4328 



Distribution limited to U.S. Government agencies and their contractors; Research and Development, May 1993. 



Other requests for this document must be referred to the Naval Civil Engineering Laboratory, 



Port Hueneme, California. 



